Springboot-2.13 整合 Kafka 基本操作，创建、删除主题。发送消息、消费消息。_springboot kafka 主题能否动态新增主题和删除主题

版本介绍

SpringBoot: 2.13

Zookeeper:  cdh-3.4.5

Kafka: 2.12-2.1.0

依赖 pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.3.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.dennis</groupId>
    <artifactId>base-kafka</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>base-kafka</name>
    <description>Demo project for Spring Boot</description>
 
    <properties>
        <java.version>1.8</java.version>
    </properties>
 
    <dependencies>
 
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
 
        <dependency>
            <groupId>org.springframework.kafka</groupId>
            <artifactId>spring-kafka</artifactId>
        </dependency>
 
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
 
        <dependency>
            <groupId>org.springframework.kafka</groupId>
            <artifactId>spring-kafka-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>
    
</project>

配置 application.yml

######################## SpringBoot 2.13 | Kafka-2.10 ##########################
spring:
  kafka:
    bootstrap-servers: IP:9092   # 集群 , 分隔
    producer:
      key-serializer: org.apache.kafka.common.serialization.StringSerializer
      value-serializer: org.apache.kafka.common.serialization.StringSerializer
    consumer:
      group-id: test
      enable-auto-commit: true
      key-serializer: org.apache.kafka.common.serialization.StringSerializer
      value-serializer: org.apache.kafka.common.serialization.StringSerializer
 

创建主题

        Properties prop = new Properties();
        prop.put("bootstrap.servers","ip:9092");
 
        AdminClient admin = AdminClient.create(prop);
 
        ArrayList<NewTopic> topics = new ArrayList<NewTopic>();
        // 创建主题  参数：主题名称、分区数、副本数
        NewTopic newTopic = new NewTopic(topic, 1, (short)1);
        topics.add(newTopic);
 
        CreateTopicsResult result = admin.createTopics(topics);
 
        try {
            result.all().get();
        } catch (InterruptedException e) {
            e.printStackTrace();
        } catch (ExecutionException e) {
            e.printStackTrace();
        }

删除主题

        Properties prop = new Properties();
        prop.put("bootstrap.servers","ip:9092");
        AdminClient client = AdminClient.create(prop);
 
        ArrayList<String> topics = new ArrayList<>();
        topics.add(topic);
 
        DeleteTopicsResult result = client.deleteTopics(topics);
 
        try {
            result.all().get();
        } catch (InterruptedException e) {
            e.printStackTrace();
        } catch (ExecutionException e) {
            e.printStackTrace();
        }

主题列表

        Properties prop = new Properties();
        prop.put("bootstrap.servers","ip:9092");
        AdminClient admin = AdminClient.create(prop);
 
        ListTopicsResult result = admin.listTopics();
        KafkaFuture<Set<String>> future = result.names();
 
        try {
            System.out.println("==================Kafka Topics====================");
            future.get().forEach(n -> System.out.println(n));
        } catch (InterruptedException e) {
            e.printStackTrace();
        } catch (ExecutionException e) {
            e.printStackTrace();
        }

生产者发送消息

 
    @Autowired
    private KafkaTemplate<String,String> kafkaTemplate;
 
    /**
     * 发送消息
     * @param msg
     * @return
     */
    @RequestMapping(value = "/send.action")
    public String send(String msg){
 
        // 主题、消息内容
        kafkaTemplate.send("flume", msg);
 
        return "success";
    }

消费者消费消息

/**
 * Created by Dennis on 2019/3/25.
 */
 
@Component
public class KafkaConsumer {
 
 
    @KafkaListener(topics = "flume")
    public void listener(ConsumerRecord<?,?> record){
        System.out.println("==================Kafka Consumer====================");
        System.out.printf("topic = %s, offset = %d, value = %s \n", record.topic(), record.offset(), record.value());
    }
 
 
}